Skateboard sign



FIG. 1 is a perspective view of a skateboard sign;

FIG. 2 is a top perspective view of a skateboard sign;

FIG. 3 is a left, side view of a skateboard sign;

FIG. 4 is a right, side view of a skateboard sign;

FIG. 5 is a rear view of a skateboard sign; and,

FIG. 6 is a bottom view of a skateboard sign. 

The ornamental design for a skateboard sign, as shown and described. 